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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2326764903239641 4.5383e-08  
a 2.30954152985874 1.0928e-08 au
q 1.772165512433769 1.0126e-07 au
i 2.581282113137942 6.3663e-06 deg
node 199.4510109286026 0.00011739 deg
peri 221.216143237682 0.00011912 deg
M 142.1171577503914 1.6304e-05 deg
tp 2456894.406099100437
(2014-Aug-24.90609910)
5.7525e-05 JED
period 1281.997242330446
3.51
9.0989e-06
2.491e-08
d
yr
n .2808118364947362 1.993e-09 deg/d
Q 2.84691754728371 1.3471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      827  
   data-arc span      9382 days (25.69 yr)  
   first obs. used      1989-10-03  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5133  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:20  

Additional Information
 Earth MOID = .784816 au 
 Jupiter MOID = 2.49999 au 
 T_jup = 3.548 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7 mag n/a MPO337435  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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